For XFCE (v. 4.8), I'm searching for possible options to minimize windows to tray (iconify). This means that 1) they're not in the window listing and 2) they're not in the alt+TAB menu and 3) when closed, the window hides (it disappears from window listing but still stays running). "alltray" has some weird GTK-related bug (https://bugs.launchpad.net/alltray/+bug/589831; windows hide but unhiding doesn't do anything; they stay in the tray icon until the user undocks them). "trayer" complains that "another systray is already running" and there's no obvious workaround. This question here is to ask about possible minimalistic (as everything in XFCE is) solutions which don't involve manual compiling, and aren't an overkill like cairo-dock is (a rather bloated gnome-style application which creates a new large 'tray' instead of using the existing one). Thanks!